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LiDAR Elevation Data: Lake Michigan (Topobathy), 2020

Identification Information

Citation
Title
LiDAR Elevation Data: Lake Michigan (Topobathy), 2020
Originator
NOAA Office for Coastal Management
Creation Date
2020-06-30
Edition
2020
Geospatial Data Presentation Form
mapDigital
Collection Title
Coastal
Abstract
LAZ files: This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data. These files contain classified topo/bathy lidar data generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. Horizontal positions, were provided to the NOAA Office for Coastal Management (OCM) in decimal degrees of latitude and longitude, referenced to the North American Datum of 1983 National Adjustment of 2011 (NAD83 (2011)). Vertical positions were referenced to the NAD83 (2011) ellipsoid and provided in meters. The 3-D position data were sub-divided into a series of LAZ files, which are tiled into 1-km by 1-km boxes defined by the Military Grid Reference System. DEM (GeoTIFFs): These files contain rasterized topobathy lidar elevations generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. Horizontal positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 Universal Transverse Mercator Zone 16 North (NAD83 2011). The lidar point data vertical positions were collected referenced to the NAD83 (2011) ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID12B model was used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). Once converted to orthometric heights, the data were then converted to the International Great Lakes Datum of 1985 (IGLD85) using the VDatum program from NOAA (National Oceanic and Atmospheric Administration). In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from are also available from the NOAA Digital Coast. A link to these data is provided in the URL section of this metadata record. DEMs at a 1 meter grid spacing, created from all classifications, are available by request at coastal.info@noaa.gov.
Purpose
This data was collected by the US Army Corps of Engineers in support of the National Coastal Mapping Program to assess changes in elevation above and below water along the Lake Michigan coastline of Illinois, Indiana, Michigan, and Wisconsin.
Supplemental Information
Dates of Lidar collection: IL: 60/18 - 06/21, 2020 IN: 06/17 - 06/18, 2020 MI: 05/26 - 06/25, 2020 WI: 05/29 - 06/30, 2020 Additional access links to this content online: (DEM) https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9970/details/9970 (LAZ) https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9232/details/9232
Temporal Extent
Time Period
Begin
2020-05-26T00:00:00
End
2020-06-30T00:00:00
Bounding Box
West
-87.94
East
-86.16
North
44.87
South
41.6
ISO Topic Category
elevation
inlandWaters
Place Keyword
Illinois, Indiana, Michigan, Wisconsin
Place Keyword Thesaurus
Theme Keyword
EARTH SCIENCE, LAND SURFACE, TOPOGRAPHY, TERRAIN ELEVATION, COASTAL PROCESSES, COASTAL ELEVATION
Theme Keyword Thesaurus
Resource Constraints
Use Limitation
Use Constraints: These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. | Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
2020 USACE NCMP Topobathy Lidar DEM/LAZ: Lake Michigan (IL, IN, MI, WI): Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products.
Point of Contact
Contact
NOAA Office for Coastal Management
Delivery Point
2234 South Hobson Ave
City
Charleston
Administrative Area
SC
Postal Code
29405-2413
Country
US
Email
coastal.info@noaa.gov
Point of Contact
Contact
U.S. Army Corps of Engineers (USACE)

Spatial Reference Information

Reference System Identifier
Code
6345
Code Space
EPSG
Version
8.2.2(10.2.1)

Data Quality Information

Lineage
Statement
Archived data at UW-Madison (December 04, 2023).

Distribution Information

Format Name
Various
Distributor
Arthur H. Robinson Map Library
Online Access
https://bin.ssec.wisc.edu/pub/wisconsinview/lidar/Lake_Michigan/USACE_Topobathy_Delivery_2020/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
2020 USACE NCMP Topobathy Lidar (DEM and LAZ): Lake Michigan (IL, IN, MI, WI)
Function
download

Content Information

Content Type
image

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
161
Row Count
870
Cell Geometry Type
area
Corner Points
Point
424839.500000 4777108.500000
Point
424839.500000 4777978.500000
Point
425000.500000 4777978.500000
Point
425000.500000 4777108.500000
Center Point
424920.000000 4777543.500000

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
DD75D319-AC13-4087-880D-918B1F4D6DBE
Metadata Date Stamp
2023-12-04
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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